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authorPaolo Abeni <pabeni@redhat.com>2024-04-26 15:34:04 +0200
committerPaolo Abeni <pabeni@redhat.com>2024-04-26 15:34:05 +0200
commitd5115a55ffb5253743346ddf628a890417e2935e (patch)
tree3441c70fb71b9bb73af14f90af4c1ece881d4d23 /include/net/tcp.h
parent15fd021bc4270273d8f4b7f58fdda8a16214a377 (diff)
parentb533fb9cf4f7c6ca2aa255a5a1fdcde49fff2b24 (diff)
Merge branch 'implement-reset-reason-mechanism-to-detect'
Jason Xing says: ==================== Implement reset reason mechanism to detect From: Jason Xing <kernelxing@tencent.com> In production, there are so many cases about why the RST skb is sent but we don't have a very convenient/fast method to detect the exact underlying reasons. RST is implemented in two kinds: passive kind (like tcp_v4_send_reset()) and active kind (like tcp_send_active_reset()). The former can be traced carefully 1) in TCP, with the help of drop reasons, which is based on Eric's idea[1], 2) in MPTCP, with the help of reset options defined in RFC 8684. The latter is relatively independent, which should be implemented on our own, such as active reset reasons which can not be replace by skb drop reason or something like this. In this series, I focus on the fundamental implement mostly about how the rstreason mechanism works and give the detailed passive part as an example, not including the active reset part. In future, we can go further and refine those NOT_SPECIFIED reasons. Here are some examples when tracing: <idle>-0 [002] ..s1. 1830.262425: tcp_send_reset: skbaddr=x skaddr=x src=x dest=x state=x reason=NOT_SPECIFIED <idle>-0 [002] ..s1. 1830.262425: tcp_send_reset: skbaddr=x skaddr=x src=x dest=x state=x reason=NO_SOCKET [1] Link: https://lore.kernel.org/all/CANn89iJw8x-LqgsWOeJQQvgVg6DnL5aBRLi10QN2WBdr+X4k=w@mail.gmail.com/ ==================== Link: https://lore.kernel.org/r/20240425031340.46946-1-kerneljasonxing@gmail.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'include/net/tcp.h')
-rw-r--r--include/net/tcp.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index ffc9371fe9de..a9eb21251195 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -670,7 +670,8 @@ int tcp_fragment(struct sock *sk, enum tcp_queue tcp_queue,
void tcp_send_probe0(struct sock *);
int tcp_write_wakeup(struct sock *, int mib);
void tcp_send_fin(struct sock *sk);
-void tcp_send_active_reset(struct sock *sk, gfp_t priority);
+void tcp_send_active_reset(struct sock *sk, gfp_t priority,
+ enum sk_rst_reason reason);
int tcp_send_synack(struct sock *);
void tcp_push_one(struct sock *, unsigned int mss_now);
void __tcp_send_ack(struct sock *sk, u32 rcv_nxt);